Alkaline accumulator



A. M. CAVE.

ALKALINE ACCUMULATOR.

APPLICATION FILED NOV- 19I8.

Patented Aug. 24, 1920.

12 00 226 M Z, ar/e &oy oooo ANTOINE MARIUS CAVE, OF ST. ETIENNE,FRANCE.

ALKALINE AGGUMULA'IOR.

' Specification of Letters Patent.

Patented Au '24, 1920.

Application filed November 7, 1918. Serial No. 261,532.

To all whom it may concern:

Be it known that I, ANTOINE Memos GAVE, a citizen of the FrenchRepublic, residing in St. Etienne, Loire, France, have invented certainnew and useful Improve ments relating to Alkaline Accumulators, of whichthe following is a specification;

The greatest difficulty met hitherto in the manufacture of theelectrodes of accumulators with alkaline electrolyte consists in theagglomeration of the OXlClS to form homogeneous and sufficientlyconductlng masses.

The present invention consists in a method of constructing theseelectrodes by which this difliculty is obviated.

The construction is illustrated in the accompanying drawings in whichFigure 1 shows respectively in front and side view the central conductoror core of an electrode.

Fig. 2 illustrates the manner in wlnch a metallic cloth is wound aroundthe conductor.

Fig. 3 is a transverse section on the lines 33 of Fig. 2.

Fig. 4 shows respectively in front and side view a finished electrode.

Fig. 5 shows an arrangement of several electrodes in a frame formingtogether a surface of greater or less size.

Fig. 6 is a transverse section on the line 22 of Fig. 5.

The plate a forming a central conductor 15 of nickel or of a metalsuitably nickelized or covered with nickel. This plate is perforatedover all its length with holes Z) which can be disposed in one or morerows, and at each end of the plate are fixed wings a. WVound around thisplate and in intimate contact with it is a metallic cloth (Z of such alength that when the cloth is folded around the plate the electrode sofar formed Wlll be of the required thickness; this cloth is formed ofthreads of nickel or of suitable metal as stated above.

The electrode being thus prepared, all the spaces left in the cloth arefilled w1th made or a suitable mixture according to the polarity that istobe given to this electrode, the same being pasted on or otherwiseapplled.

' The whole is then covered with an insulating envelop e permeab'le'togases, and formed of fibrous vegetable or mineral tissues; this envelopis kept in place by a wrapping of braids, cords or tapes f, formed ofthe same form,

the electrode.

\Vhen a plate has been covered with itsinsulating envelop held by thecords, the wings c are bent down against the envelop surface so astohold the edges thereof (Fig. 4:) and the whole is submitted to theaction of a press in a suitable mold to insure a still more completecontact between the oxids and the metallic cloth. It is evident thatthis pressure might be exerted before the insulating envelop is put inplace; also, that instead of the electrode being a plate it might be ofcylindrical, tubular or other form.

In order to obtain a desired amount of active surface it is suflicientto assemble a number of electrodes, whatever may be their in a frameformed, for example, by side pieces 9, and cross pieces h (Figs. 5 and6). These frames, forming also supports,

- can be insulated by a suitable covering or casing, if soluble negativeelectrodes are used.

In this latter case the negative electrodes would consist of metallicsheets, which may be corrugated or plain and be formed of any suitablemetal such as ZlIlC, but all the metals of which an oxid is soluble inalkalis are suitable if a suitable oxid is applied to the positive pole.

It should be noticed that when a soluble electrode is employed it isadvantageous to surround the negative plate or to prevent movement ofthe reacting liquid by means of porous material insensitive to alkalisand which will help to maintain the deposits on their support betterthan the arrangements previously known.

Having thus described the nature of the said invention and the bestmeans I know of carrying the same into practical effect, I claim 1. Anelectrode for electric accumulators, comprising in combination a centralconducting metal plate having perforations along its length, metalliccloth wrapped around and in intimate contact With the plate, activematerial filling the interstices in the cloth, and an insulating enveloppermeable to gases covering the cloth.

2. An electrode for electric accumulators,

comprising in combination a central con ducting metal plate havingperforations along its length, metallic cloth Wrapped around and inintimate contact With the plate, active material filling the intersticesin the cloth, an insulating envelop permeable to gases covering thecloth, and bands of vegetable tissue enwrapping the envelop.

3. An electrode for electric accumulators,

comprising in combination a central con- 4. An. electrode for electricaccumulators,

comprising in combination a central conducting metal plate -havingperforations along its length, metallic cloth Wrapped around the plate,active material filling the interstices in the cloth, an insulatingenvelop permeable to gases and covering the cloth, bands of vegetabletissue enwrapping the envelops and reinforcing metallic threadsincorporated With the tissues of the bands.

5'. In an electric accumulator a positive electrode comprising incombination a C8111 tral conducting metal plate having perforationsalong its length, metallic cloth Wrapped around and. in intimate contactwith the plate, active material filling the interstices in the cloth,and an insulating envelop permeable to gases covering the cloth, and anegative electrode consisting of a metallic sheet soluble in theelectrolyte in the accumulator.

6. In an electric accumulator a positive electrode comprising incombination a central conducting metal plate having perforations alongits length, metallic cloth Wrapped around the plate, active materialfilling the interstices in the cloth and the holes in the plate, and aninsulating envelop permeable to gases covering the cloth, a negativeelectrode consisting of ametallic sheet soluble in the electrolyte inthe, accumulator and a porous material insensitive to alkalissurrounding the sheet.

In testimony whereof I have signed my name 7 to this specification.

ANTOINE mints GAVE, 1,. 8-H

